Alfonso III of Asturias

Alfonso III "the Great" of Asturias (848-December 910) was the King of Asturias from 866 to 910, succeeding Ordonno I of Asturias and preceding Fruela II of Asturias; King of Leon from 866 to 910, succeeding Ordono I and preceding Garcia I of Leon; and King of Galicia from 866 to 910, preceding Ordonno II of Leon.

Biography
Alfonso was from the House of de Cantabria, and was of Visigothic Christian descent. He succeeded his father Ordonno I of Leon as king of Asturias in 866, and he consolidated the strength of his country while the Umayyad Caliphate weakened. In 867 he defeated a Basque rebellion and later a Galician one, and in 869 he made an alliance with the Kingdom of Pamplona. In 909, his sons Fruela, Ordono, and Garcia rebelled and forced him to abdicate; Garcia became king of Leon, Ordono became king of Galicia, and Fruela ruled Asturias. Alfonso died the next year, beginning a series of internecine struggles.